JP2023529975A - 磁気共鳴画像の改善された取得及び／又は再構成のためのｂ０不均一性の推定 - Google Patents

磁気共鳴画像の改善された取得及び／又は再構成のためのｂ０不均一性の推定 Download PDF

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JP2023529975A
JP2023529975A JP2022577208A JP2022577208A JP2023529975A JP 2023529975 A JP2023529975 A JP 2023529975A JP 2022577208 A JP2022577208 A JP 2022577208A JP 2022577208 A JP2022577208 A JP 2022577208A JP 2023529975 A JP2023529975 A JP 2023529975A
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magnetic resonance
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JPWO2021254861A5 (zh
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ウメシュ スリヤナラヤナ ルドラパトナ
ジャラダル ネーラヴァッリ
カルシク ゴパラクリシュナン
スタンバラ ナガラジュ
ナヴィーン バジャイ
カンディ ラペシュ ヴァカチ
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Koninklijke Philips NV
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Koninklijke Philips NV
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    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
    • G01R33/44—Arrangements or instruments for measuring magnetic variables involving magnetic resonance using nuclear magnetic resonance [NMR]
    • G01R33/48—NMR imaging systems
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    • G01R33/565—Correction of image distortions, e.g. due to magnetic field inhomogeneities
    • G01R33/56563—Correction of image distortions, e.g. due to magnetic field inhomogeneities caused by a distortion of the main magnetic field B0, e.g. temporal variation of the magnitude or spatial inhomogeneity of B0
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    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
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    • A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves 
    • A61B5/055—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves  involving electronic [EMR] or nuclear [NMR] magnetic resonance, e.g. magnetic resonance imaging
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    • G01—MEASURING; TESTING
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    • G01R33/48—NMR imaging systems
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    • G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
    • G01R33/44—Arrangements or instruments for measuring magnetic variables involving magnetic resonance using nuclear magnetic resonance [NMR]
    • G01R33/48—NMR imaging systems
    • G01R33/483—NMR imaging systems with selection of signals or spectra from particular regions of the volume, e.g. in vivo spectroscopy
    • G01R33/4833—NMR imaging systems with selection of signals or spectra from particular regions of the volume, e.g. in vivo spectroscopy using spatially selective excitation of the volume of interest, e.g. selecting non-orthogonal or inclined slices
    • G01R33/4835—NMR imaging systems with selection of signals or spectra from particular regions of the volume, e.g. in vivo spectroscopy using spatially selective excitation of the volume of interest, e.g. selecting non-orthogonal or inclined slices of multiple slices
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
    • G01R33/44—Arrangements or instruments for measuring magnetic variables involving magnetic resonance using nuclear magnetic resonance [NMR]
    • G01R33/48—NMR imaging systems
    • G01R33/54—Signal processing systems, e.g. using pulse sequences ; Generation or control of pulse sequences; Operator console
    • G01R33/56—Image enhancement or correction, e.g. subtraction or averaging techniques, e.g. improvement of signal-to-noise ratio and resolution
    • G01R33/5608—Data processing and visualization specially adapted for MR, e.g. for feature analysis and pattern recognition on the basis of measured MR data, segmentation of measured MR data, edge contour detection on the basis of measured MR data, for enhancing measured MR data in terms of signal-to-noise ratio by means of noise filtering or apodization, for enhancing measured MR data in terms of resolution by means for deblurring, windowing, zero filling, or generation of gray-scaled images, colour-coded images or images displaying vectors instead of pixels
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
    • G01R33/44—Arrangements or instruments for measuring magnetic variables involving magnetic resonance using nuclear magnetic resonance [NMR]
    • G01R33/48—NMR imaging systems
    • G01R33/54—Signal processing systems, e.g. using pulse sequences ; Generation or control of pulse sequences; Operator console
    • G01R33/56—Image enhancement or correction, e.g. subtraction or averaging techniques, e.g. improvement of signal-to-noise ratio and resolution
    • G01R33/561—Image enhancement or correction, e.g. subtraction or averaging techniques, e.g. improvement of signal-to-noise ratio and resolution by reduction of the scanning time, i.e. fast acquiring systems, e.g. using echo-planar pulse sequences
    • G01R33/5615—Echo train techniques involving acquiring plural, differently encoded, echo signals after one RF excitation, e.g. using gradient refocusing in echo planar imaging [EPI], RF refocusing in rapid acquisition with relaxation enhancement [RARE] or using both RF and gradient refocusing in gradient and spin echo imaging [GRASE]
    • G01R33/5616—Echo train techniques involving acquiring plural, differently encoded, echo signals after one RF excitation, e.g. using gradient refocusing in echo planar imaging [EPI], RF refocusing in rapid acquisition with relaxation enhancement [RARE] or using both RF and gradient refocusing in gradient and spin echo imaging [GRASE] using gradient refocusing, e.g. EPI
    • G—PHYSICS
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  • Engineering & Computer Science (AREA)
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  • Condensed Matter Physics & Semiconductors (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
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  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
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  • Public Health (AREA)
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  • Mathematical Physics (AREA)
  • Software Systems (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
JP2022577208A 2020-06-15 2021-06-10 磁気共鳴画像の改善された取得及び／又は再構成のためのｂ０不均一性の推定 Pending JP2023529975A (ja)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP20179903.8 2020-06-15
EP20179903.8A EP3926355A1 (en) 2020-06-15 2020-06-15 Estimation of b0 inhomogeneities for improved acquisition and/or reconstruction of magnetic resonance images
PCT/EP2021/065586 WO2021254861A1 (en) 2020-06-15 2021-06-10 Estimation of b0 inhomogeneities for improved acquisition and/or reconstruction of magnetic resonance images

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JP2023529975A true JP2023529975A (ja) 2023-07-12
JPWO2021254861A5 JPWO2021254861A5 (zh) 2024-06-14

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JP2022577208A Pending JP2023529975A (ja) 2020-06-15 2021-06-10 磁気共鳴画像の改善された取得及び／又は再構成のためのｂ０不均一性の推定

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US (1) US20230280429A1 (zh)
EP (2) EP3926355A1 (zh)
JP (1) JP2023529975A (zh)
CN (1) CN115943318A (zh)
WO (1) WO2021254861A1 (zh)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7116105B1 (en) * 2005-04-01 2006-10-03 Toshiba America Mri, Inc. Magnetic field mapping during SSFP using phase-incremented or frequency-shifted magnitude images
US8854038B2 (en) * 2011-04-19 2014-10-07 Wisconsin Alumni Research Foundation Method for R2* quantification with magnetic resonance imaging
DE102014210778B4 (de) * 2014-06-05 2016-01-14 Siemens Aktiengesellschaft Erzeugung einer Parameterkarte in der Magnetresonanztechnik
DE102015204955B4 (de) * 2015-03-19 2019-05-16 Siemens Healthcare Gmbh Verfahren zur Magnetresonanz-Bildgebung

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CN115943318A (zh) 2023-04-07
US20230280429A1 (en) 2023-09-07
WO2021254861A1 (en) 2021-12-23
EP3926355A1 (en) 2021-12-22
EP4165425A1 (en) 2023-04-19

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